This guy is trying to photograph goslings that are hiding in the bush.

The weather was partially cloudy with some winds. So, every couple of minutes, this guy was taking his ExpoDisc out from his side pocket and re-metering his white balance.

Most of the time, I do not bother with the white balance, I have my camera set to daylight white balance. The problem is indoors when trying to balance flash with compact fluorescent or cheap LED lights. Then I have to decide:

  1. Overwhelm the ambient light with the flash and set the white balance to flash
  2. Set the white balance to the ambient light (fluorescent…) and just add a touch to flash to open the shadows.

I almost never set the white balance to auto, it will change from frame to frame and will make my work much harder.

expodisc white balance

Expodisc White Balance

Technical

Before (left) and after (right) as processed with Darktable 2.2.4

Before (left) and After (right)

Camera: Canon 7D ISO 250 and 1/200
Lens: Canon 70-200mm f/4 @106mm and f/7.1
Processed with Darktable 2.2.4: http://www.darktable.org/